Nektar::UpwindSolver Class Reference

#include <UpwindSolver.h>

Inheritance diagram for Nektar::UpwindSolver:

Collaboration diagram for Nektar::UpwindSolver:

Static Public Member Functions
static RiemannSolverSharedPtr	create ()

Static Public Attributes
static std::string	solverName

Protected Member Functions
	UpwindSolver ()
virtual void	v_PointSolve (NekDouble pL, NekDouble rhoL, NekDouble uL, NekDouble vL, NekDouble wL, NekDouble pR, NekDouble rhoR, NekDouble uR, NekDouble vR, NekDouble wR, NekDouble p0, NekDouble rho0, NekDouble u0, NekDouble v0, NekDouble w0, NekDouble &pF, NekDouble &rhoF, NekDouble &uF, NekDouble &vF, NekDouble &wF)
	Upwind Riemann solver. More...
Protected Member Functions inherited from Nektar::APESolver
	APESolver ()
virtual void	v_Solve (const int nDim, const Array< OneD, const Array< OneD, NekDouble > > &Fwd, const Array< OneD, const Array< OneD, NekDouble > > &Bwd, Array< OneD, Array< OneD, NekDouble > > &flux)
Array< OneD, Array< OneD, NekDouble > >	GetRotBasefield ()
Protected Member Functions inherited from Nektar::SolverUtils::RiemannSolver
SOLVER_UTILS_EXPORT	RiemannSolver ()
void	GenerateRotationMatrices (const Array< OneD, const Array< OneD, NekDouble > > &normals)
	Generate rotation matrices for 3D expansions. More...
void	FromToRotation (Array< OneD, const NekDouble > &from, Array< OneD, const NekDouble > &to, NekDouble *mat)
	A function for creating a rotation matrix that rotates a vector from into another vector to. More...
SOLVER_UTILS_EXPORT void	rotateToNormal (const Array< OneD, const Array< OneD, NekDouble > > &inarray, const Array< OneD, const Array< OneD, NekDouble > > &normals, const Array< OneD, const Array< OneD, NekDouble > > &vecLocs, Array< OneD, Array< OneD, NekDouble > > &outarray)
	Rotate a vector field to trace normal. More...
SOLVER_UTILS_EXPORT void	rotateFromNormal (const Array< OneD, const Array< OneD, NekDouble > > &inarray, const Array< OneD, const Array< OneD, NekDouble > > &normals, const Array< OneD, const Array< OneD, NekDouble > > &vecLocs, Array< OneD, Array< OneD, NekDouble > > &outarray)
	Rotate a vector field from trace normal. More...
SOLVER_UTILS_EXPORT bool	CheckScalars (std::string name)
	Determine whether a scalar has been defined in m_scalars. More...
SOLVER_UTILS_EXPORT bool	CheckVectors (std::string name)
	Determine whether a vector has been defined in m_vectors. More...
SOLVER_UTILS_EXPORT bool	CheckParams (std::string name)
	Determine whether a parameter has been defined in m_params. More...
SOLVER_UTILS_EXPORT bool	CheckAuxScal (std::string name)
	Determine whether a scalar has been defined in m_auxScal. More...
SOLVER_UTILS_EXPORT bool	CheckAuxVec (std::string name)
	Determine whether a vector has been defined in m_auxVec. More...

Additional Inherited Members
Public Member Functions inherited from Nektar::SolverUtils::RiemannSolver
SOLVER_UTILS_EXPORT void	Solve (const int nDim, const Array< OneD, const Array< OneD, NekDouble > > &Fwd, const Array< OneD, const Array< OneD, NekDouble > > &Bwd, Array< OneD, Array< OneD, NekDouble > > &flux)
	Perform the Riemann solve given the forwards and backwards spaces. More...
template<typename FuncPointerT , typename ObjectPointerT >
void	SetScalar (std::string name, FuncPointerT func, ObjectPointerT obj)
void	SetScalar (std::string name, RSScalarFuncType fp)
template<typename FuncPointerT , typename ObjectPointerT >
void	SetVector (std::string name, FuncPointerT func, ObjectPointerT obj)
void	SetVector (std::string name, RSVecFuncType fp)
template<typename FuncPointerT , typename ObjectPointerT >
void	SetParam (std::string name, FuncPointerT func, ObjectPointerT obj)
void	SetParam (std::string name, RSParamFuncType fp)
template<typename FuncPointerT , typename ObjectPointerT >
void	SetAuxScal (std::string name, FuncPointerT func, ObjectPointerT obj)
template<typename FuncPointerT , typename ObjectPointerT >
void	SetAuxVec (std::string name, FuncPointerT func, ObjectPointerT obj)
std::map< std::string, RSScalarFuncType > &	GetScalars ()
std::map< std::string, RSVecFuncType > &	GetVectors ()
std::map< std::string, RSParamFuncType > &	GetParams ()
Public Attributes inherited from Nektar::SolverUtils::RiemannSolver
int	m_spacedim
Protected Attributes inherited from Nektar::SolverUtils::RiemannSolver
bool	m_requiresRotation
	Indicates whether the Riemann solver requires a rotation to be applied to the velocity fields. More...
std::map< std::string, RSScalarFuncType >	m_scalars
	Map of scalar function types. More...
std::map< std::string, RSVecFuncType >	m_vectors
	Map of vector function types. More...
std::map< std::string, RSParamFuncType >	m_params
	Map of parameter function types. More...
std::map< std::string, RSScalarFuncType >	m_auxScal
	Map of auxiliary scalar function types. More...
std::map< std::string, RSVecFuncType >	m_auxVec
	Map of auxiliary vector function types. More...
Array< OneD, Array< OneD, NekDouble > >	m_rotMat
	Rotation matrices for each trace quadrature point. More...
Array< OneD, Array< OneD, Array< OneD, NekDouble > > >	m_rotStorage
	Rotation storage. More...

Detailed Description

Definition at line 48 of file solvers/APESolver/RiemannSolvers/UpwindSolver.h.

Constructor & Destructor Documentation

Nektar::UpwindSolver::UpwindSolver ( )

protected

Definition at line 48 of file solvers/APESolver/RiemannSolvers/UpwindSolver.cpp.

                           :
    APESolver()
{

}

Member Function Documentation

static RiemannSolverSharedPtr Nektar::UpwindSolver::create ( )

inlinestatic

Definition at line 51 of file solvers/APESolver/RiemannSolvers/UpwindSolver.h.

        {
            return RiemannSolverSharedPtr(new UpwindSolver());
        }

void Nektar::UpwindSolver::v_PointSolve ( NekDouble  pL, NekDouble  rhoL, NekDouble  uL, NekDouble  vL, NekDouble  wL, NekDouble  pR, NekDouble  rhoR, NekDouble  uR, NekDouble  vR, NekDouble  wR, NekDouble  p0, NekDouble  rho0, NekDouble  u0, NekDouble  v0, NekDouble  w0, NekDouble &  pF, NekDouble &  rhoF, NekDouble &  uF, NekDouble &  vF, NekDouble &  wF  )

protectedvirtual

Upwind Riemann solver.

Parameters

pL	Perturbation pressure left state
rhoL	Perturbation density left state
pR	Perturbation pressure right state
rhoR	Perturbation density right state
uL	x perturbation velocity component left state
uR	x perturbation velocity component right state
vL	y perturbation velocity component left state
vR	y perturbation velocity component right state
wL	z perturbation velocity component left state
wR	z perturbation velocity component right state
p0	Base pressure
rho0	Base density
u0	Base x velocity component
v0	Base y velocity component
w0	Base z velocity component
pF	Computed Riemann flux for perturbation pressure
rhoF	Computed Riemann flux for perturbation density
uF	Computed Riemann flux for x perturbation velocity component
vF	Computed Riemann flux for y perturbation velocity component
wF	Computed Riemann flux for z perturbation velocity component

Reimplemented from Nektar::APESolver.

Definition at line 79 of file solvers/APESolver/RiemannSolvers/UpwindSolver.cpp.

References ASSERTL1, Nektar::SolverUtils::RiemannSolver::CheckParams(), and Nektar::SolverUtils::RiemannSolver::m_params.

{
    // fetch params
    ASSERTL1(CheckParams("Gamma"), "Gamma not defined.");
    const NekDouble &gamma = m_params["Gamma"]();

    // Speed of sound
    NekDouble c = sqrt(gamma * p0 / rho0);

    Array<OneD, NekDouble> characteristic(4);
    Array<OneD, NekDouble> W(2);
    Array<OneD, NekDouble> lambda(2);

    // compute the wave speeds
    lambda[0] = u0 + c;
    lambda[1] = u0 - c;

    // calculate the caracteristic variables
    //left characteristics
    characteristic[0] = pL/2 + uL*c*rho0/2;
    characteristic[1] = pL/2 - uL*c*rho0/2;
    //right characteristics
    characteristic[2] = pR/2 + uR*c*rho0/2;
    characteristic[3] = pR/2 - uR*c*rho0/2;

    //take left or right value of characteristic variable
    for (int j = 0; j < 2; j++)
    {
        if (lambda[j] >= 0)
        {
            W[j] = characteristic[j];
        }
        if (lambda[j] < 0)
        {
            W[j] = characteristic[j+2];
        }
    }

    //calculate conservative variables from characteristics
    NekDouble p = W[0] + W[1];
    NekDouble u = (W[0] - W[1])/(c*rho0);

    // assemble the fluxes
    pF = rho0*u + u0*p/(c*c);
    uF = p/rho0 + u0*u + v0*vL + w0*wL;
    vF = 0.0;
    wF = 0.0;
}

Member Data Documentation

std::string Nektar::UpwindSolver::solverName

static

Initial value:

= SolverUtils::GetRiemannSolverFactory().
                                       RegisterCreatorFunction("APEUpwind", UpwindSolver::create,
                                               "Upwind solver for the APE equation")

Definition at line 56 of file solvers/APESolver/RiemannSolvers/UpwindSolver.h.